MOTOROLA MVME-705-1

Description

Detailed Parameter Table

MOTOROLA MVME-705-1

Product Introduction

The Motorola MVME-705-1 is a legacy high-density serial communication module from Motorola’s industrial automation lineup, engineered to enable scalable, multi-protocol connectivity for distributed devices in VMEbus-based systems. As a 3U VME device, it stands out from lower-port modules like the Motorola MVME-712/M’s built-in serial ports by offering 8 dedicated, configurable serial ports—filling a critical niche for applications that require connecting dozens of sensors, actuators, or legacy HMIs across factory floors.

In automation architectures, the Motorola MVME-705-1 acts as a “serial connectivity hub”: its ability to switch each port between RS-232C (short-range), RS-422 (long-range, point-to-point), and RS-485 (long-range, multi-drop) eliminates the need for protocol-specific modules. For example, in a regional logistics warehouse, the Motorola MVME-705-1 can use 4 RS-485 ports to connect 120 barcode scanners (tracking pallet locations) and 4 RS-232C ports to link local operator HMIs—all paired with a Motorola MVME712-101 controller for data processing. Today, it remains indispensable for maintaining legacy systems in sectors like manufacturing, municipal utilities, and logistics, where replacing high-port-count serial infrastructure would disrupt proven workflows.

Core Advantages and Technical Highlights

8 Configurable Ports for Versatile Connectivity: The Motorola MVME-705-1’s ability to switch each port between three protocols via hardware jumpers eliminates the need for 2–3 separate single-protocol modules. In a food processing plant, this means the Motorola MVME-705-1 can use RS-485 ports to connect 24 temperature sensors (1000m from the control room) and RS-232C ports to link 4 batch printers (local to the controller)—reducing VME chassis slot usage by 66% compared to using dedicated RS-232 and RS-485 modules. This versatility also future-proofs systems: if a device is replaced (e.g., an RS-232C HMI swapped for an RS-485 model), no new hardware is needed—just a jumper adjustment.

Long-Range RS-422/RS-485 for Distributed Systems: Unlike RS-232C-focused modules limited to 15 meters, the Motorola MVME-705-1’s RS-422/RS-485 ports support up to 1200 meters—critical for large-scale industrial facilities. In a water treatment plant, RS-485 ports with selectable 120Ω termination connect 32 flow sensors across 8 pump stations (each 500–800m from the control room) without signal degradation. The 1 kV ESD protection also prevents port damage from electrical surges (common during stormy weather), reducing unplanned downtime by 50% compared to non-protected modules.

High-Density Design for Space Efficiency: With 8 ports in a single 3U VME slot, the Motorola MVME-705-1 offers twice the density of 4-port modules like the Motorola MVME-761-001. This is game-changing for systems with limited chassis space: in a municipal traffic control center, the Motorola MVME-705-1 can connect 8 RS-485-based traffic signal controllers (one per intersection) to a central Motorola MVME712-101—avoiding the need for two 4-port modules. The compact design also simplifies wiring: a single terminal block connects all 8 ports, cutting cable management time by 40%.

Typical Application Scenarios

The Motorola MVME-705-1 excels in large-scale distributed serial networks. In a regional automotive parts warehouse (paired with Motorola MVME712-101), the Motorola MVME-705-1 manages inventory tracking: 6 RS-485 ports connect 192 barcode scanners (one per storage rack, 200–500m from the control room) to log pallet movements, while 2 RS-232C ports link to operator HMIs for manual inventory checks. The module’s RS-485 termination ensures clear signal transmission over long distances, while ESD protection withstands electrical noise from warehouse forklifts—preventing scanner data corruption that would cause inventory discrepancies.

In a steel mill’s rolling mill control system, the Motorola MVME-705-1 integrates with a Motorola MVME-147-023 controller: 4 RS-422 ports connect to high-precision encoder sensors (measuring roll speed at 1000 RPM, 1 Mbps data rate) and 4 RS-485 ports link to 120 temperature sensors (monitoring roll heat). The module’s 0°C–60°C operating range handles the mill’s hot ambient conditions, while EEPROM-stored baud rate settings retain configurations during power outages—avoiding time-consuming reconfiguration that would delay production restarts. For the mill, the Motorola MVME-705-1 avoids the $60k cost of upgrading to Ethernet-based sensors, extending the life of its legacy serial network by 7+ years.

MOTOROLA MVME-705-1

Related Model Recommendations

Motorola MVME712-101: Mid-Tier VME SBC. Host controller for Motorola MVME-705-1; processes serial data from 8 ports and executes control logic in mid-scale systems (e.g., warehouse inventory tracking).

Motorola MVME-717: 8-Port Serial Module. Close sibling of Motorola MVME-705-1; identical port count but adds advanced diagnostic firmware—ideal for systems requiring real-time port fault alerts (e.g., power plant sensor networks).

Motorola MVME-761-001: Serial + Ethernet Module. Complements Motorola MVME-705-1 by adding 10Base-T Ethernet; bridges serial sensor data to SCADA systems for remote monitoring (e.g., water treatment plant dashboards).

Emerson RSTi-EP Serial Gateway: Modern Replacement. Replaces Motorola MVME-705-1 in Ethernet migrations; 8 serial ports + Gigabit Ethernet for legacy device integration with modern networks.

Phoenix Contact RS-485 Repeater: Signal Booster. Extends Motorola MVME-705-1’s RS-485 range beyond 1200 meters (e.g., large factory campuses with distant sensors).

Motorola MVME-050: Digital I/O Module. Pairs with Motorola MVME-705-1 to add 16 discrete channels; controls alarms or relays based on serial sensor data (e.g., warehouse “low stock” indicators).

Belkin RS-485 Twisted-Pair Cable: Accessory for Motorola MVME-705-1; shielded design minimizes noise for long-distance serial communication (e.g., 1000m sensor links in steel mills).

Motorola FLN4234A: Ethernet Gateway. Bridges Motorola MVME-705-1 (via a VME controller) to cloud platforms; transmits aggregated serial data for remote oversight (e.g., logistics warehouse inventory reports).

Installation, Commissioning and Maintenance Instructions

Installation preparation: Before installing Motorola MVME-705-1, power off the VME chassis and verify compatibility with ±12 VDC (0.3 A max) and +5 VDC (1.5 A max) to prevent electrical damage. Use an anti-static wristband and mat to protect the module’s serial transceivers from ESD. Gather tools: Phillips screwdriver (chassis mounting), twisted-pair shielded cables (RS-232C/RS-422/RS-485), torque wrench (0.5–0.8 N·m for terminals), and a multimeter (to test signal levels). Set port protocols via hardware jumpers (refer to the datasheet for pinout guidance) before wiring, and ground RS-422/RS-485 cable shields at one end to minimize noise. Avoid installing near high-EMI sources (e.g., variable-frequency drives, welding equipment).

Maintenance suggestions: For routine care, inspect Motorola MVME-705-1’s LEDs monthly—blinking “TX/RX” confirms data flow, while red “error” LEDs alert to port faults (e.g., incorrect termination or overvoltage). Clean the module quarterly with compressed air (low pressure) to remove dust from the VME connector and port terminals. Every 6 months, verify RS-485 termination settings (120Ω for end-of-line ports) and test signal strength with a multimeter (ensure >0.5 V differential voltage for RS-422/RS-485). If a port fails, reconfigure a spare port via jumpers; replace the module if serial transceivers or surge protection components malfunction. Store a backup EEPROM with baud rate/parity settings to minimize downtime during replacement.

Service and Guarantee Commitment

We back Motorola MVME-705-1 with a 90-day warranty for all refurbished units, covering defects in serial communication, LED indicators, and surge protection. Each refurbished Motorola MVME-705-1 undergoes rigorous testing: 24-hour serial data transfer (1 Mbps for RS-485, 115.2 kbps for RS-232C, zero packet loss), termination validation, and temperature cycling (0°C–60°C)—ensuring compliance with original Motorola industrial standards.

Our 24/7 technical support team provides guidance on Motorola MVME-705-1 installation, jumper configuration, and integration with legacy VME controllers (e.g., Motorola MVME712-101). We offer customized maintenance plans: quarterly remote serial health checks (via paired controllers) and semi-annual on-site port testing. Our spare parts inventory includes critical components (serial transceivers, EEPROMs, surge diodes) for fast repairs, minimizing downtime in large-scale serial networks. For users modernizing to Ethernet, we provide free consultation to pair Motorola MVME-705-1 with Emerson’s RSTi-EP gateways, ensuring a seamless transition while retaining legacy serial devices.